For some odd reason when I'm building gigantic ships the mass of them will act odd. It has happened twice to me. Both times it has changed the mass of a ship that easily has 500k+ blocks on it, to a 9 mass ship. I didn't notice until I was able to travel at a speed of 90,000 and warped away from everything I used to know. Both times I had just left one large ship, got into a ship core (only the core) and flew to the other large ship. The second was always larger than the first.
As a note, it fixes the mass after a client restart. But never by getting out and back in for some reason.
As a note, it fixes the mass after a client restart. But never by getting out and back in for some reason.